The APB interconnect connects one or more APB bus masters, for example an APB-AP and an APB interface driven by an on-chip processor. APB interconnects can be cascaded, for example to split across multiple clock or power domains.

Each APB Interconnect implements a ROM table at address 0x00000000, which identifies the locations of the CoreSight components accessed through it.

The APB Interconnect implements a 32-bit data bus.